Question:
Do magnetic forces obey Newton’s third law. Verify for two current elements
$d l_{1}=d l \hat{i} \quad$ located at the origin and
$d l_{2}=d l \hat{j} \quad$ located at $(0, \mathrm{R}, 0) .$ Both carry current $\mathrm{I}$.
Solution:
The magnetic forces do not obey Newton’s third law if there is no current flowing in the conductor which is placed parallel to each other.